:root {
  color-scheme: light;
  --canvas: #f4eddf;
  --paper: #fffdf9;
  --surface: #ffffff;
  --ink: #172452;
  --body: #20262b;
  --muted: #6f777d;
  --line: #dddeda;
  --blue: #315ac7;
  --blue-deep: #243c92;
  --blue-soft: #edf2ff;
  --coral: #f27655;
  --coral-soft: #fff0e8;
  --purple: #7561c7;
  --purple-soft: #f0edff;
  --teal: #38bcae;
  --teal-soft: #e5f4f0;
  --yellow: #f4c759;
  --yellow-soft: #fff6d9;
  --rail: #eef2ff;
  --header: rgba(255, 253, 249, .94);
  --shadow: rgba(50, 46, 73, .11);
  --focus: rgba(49, 90, 199, .3);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #191d1b;
  --paper: #1d201f;
  --surface: #272c2a;
  --ink: #f1f3f8;
  --body: #edf0ee;
  --muted: #aeb7b2;
  --line: #3c4641;
  --blue: #6f91ed;
  --blue-deep: #8ca8f0;
  --blue-soft: #26324a;
  --coral: #ef896d;
  --coral-soft: #462f2b;
  --purple: #927edb;
  --purple-soft: #342f4a;
  --teal: #55cfc0;
  --teal-soft: #213a37;
  --yellow: #e9c665;
  --yellow-soft: #443922;
  --rail: #202632;
  --header: rgba(29, 32, 31, .95);
  --shadow: rgba(0, 0, 0, .3);
  --focus: rgba(111, 145, 237, .36);
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  min-width: 320px;
  background: var(--canvas);
}

body {
  margin: 0;
  color: var(--body);
  background-color: var(--canvas);
  background-image:
    radial-gradient(circle at 12% 12%, rgba(185, 139, 75, .08) 0 1px, transparent 1.5px),
    radial-gradient(circle at 84% 72%, rgba(75, 111, 157, .06) 0 1px, transparent 1.5px),
    linear-gradient(90deg, rgba(255, 255, 255, .25), transparent 14%, transparent 86%, rgba(107, 78, 40, .05));
  background-size: 23px 23px, 31px 31px, 100% 100%;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

:root[data-theme="dark"] body {
  background-image: none;
}

button,
a {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.shell {
  width: min(calc(100% - 32px), 1180px);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--blue) 9%, transparent);
  background: var(--header);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  display: flex;
  min-height: 82px;
  align-items: center;
  gap: 20px;
}

.brand,
.brand-copy,
.topbar-actions,
.topbar-action,
.topbar-meta,
.quiz-context,
.answers-heading,
.controls,
.privacy-note,
.flow-heading,
.progress-copy,
.nav-heading,
.nav-legend span {
  display: flex;
  align-items: center;
}

.brand {
  min-width: 0;
  gap: 13px;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--coral) 18%, var(--line));
  border-radius: 10px;
  color: var(--ink);
  background: var(--coral-soft);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--coral) 16%, transparent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 23px;
  font-weight: 500;
}

.brand-copy {
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
}

.brand h1 {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 11px;
}

.topbar-meta {
  gap: 10px;
  margin-left: auto;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 11px;
}

.topbar-meta i {
  width: 24px;
  height: 1px;
  background: var(--blue-deep);
}

.topbar-actions {
  gap: 9px;
}

.topbar-action {
  min-height: 40px;
  justify-content: center;
  gap: 7px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--body);
  text-decoration: none;
  background: var(--surface);
  cursor: pointer;
  font-size: 12px;
}

.topbar-action:hover {
  border-color: color-mix(in srgb, var(--blue) 38%, var(--line));
}

.topbar-action.primary {
  border-color: var(--blue-deep);
  color: #ffffff;
  background: var(--blue-deep);
  box-shadow: 0 9px 20px color-mix(in srgb, var(--blue) 18%, transparent);
}

.action-icon {
  display: inline-grid;
  min-width: 16px;
  place-items: center;
  font-size: 16px;
  line-height: 1;
}

.page-shell {
  padding: 18px 0 0;
}

.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(310px, .82fr);
  min-height: 720px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--canvas);
  box-shadow: 0 20px 55px var(--shadow);
}

.quiz-main {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 35px 43px 31px;
}

.quiz-main::before,
.quiz-main::after {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--purple) 32%, transparent);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.quiz-main::before {
  top: 108px;
  right: -116px;
  width: 290px;
  height: 290px;
}

.quiz-main::after {
  bottom: 58px;
  left: -102px;
  width: 185px;
  height: 185px;
  border-color: color-mix(in srgb, var(--coral) 34%, transparent);
}

.decor-spark {
  position: absolute;
  z-index: 0;
  display: block;
  width: 8px;
  height: 8px;
  border: 2px solid var(--coral);
  transform: rotate(45deg);
  pointer-events: none;
}

.decor-spark.one {
  top: 96px;
  left: 29px;
}

.decor-spark.two {
  right: 34px;
  bottom: 49px;
  border-color: var(--blue);
}

.quiz-context {
  position: relative;
  z-index: 1;
  justify-content: space-between;
  gap: 15px;
  color: var(--muted);
  font-size: 11px;
}

.quiz-context strong {
  color: var(--ink);
  font-size: 12px;
  font-weight: 500;
}

.quiz-context span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.quiz-context span::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--coral);
  content: "";
}